Liquid dispensing device



Dec. 27, 1932. L, THOMPSQN LIQUID DIsPENsING DEVICE Filed Sept. 27 19292 Sheets-Sheet MW s NP WM MW T N N V. L

Yf -P A TT'OHNE Y5 Patented Dec. 27, 1932 UNITED PYAT EaN-T oFFicELYNNEHOMPSON, OF MINN'EAPOEISfMINNESOTA; ASSIGNOR, BY M-ESNEASSIGNMENTS, TO'OLIVE"SYMONS,' OF 'MINNEAPOLIS, MINNESOTA LIQUIDmsrnnsme imvron f Application filed-September 27, 1929. serial-110,395,634.

"letipassaga'the latter communicating with a conduithavin'g one endsupported in said casing and extending upwardly and outwardly therefromto provide .adischarge for the pump and aplunger being reciprocallymounted in said chamber and provided with a stem movably having. one endof a rod. detachably-secured thereto and provided at its upper end withsuitable means for actuatin'git.

Features of the invention reside-in the general construction: of thepump and plunger which is such as to-reduce the-numberof parts andjointsto a m-lnimum; 1n the .means provided =for adjusting the-stroke ofthe plunger to regulate the quantity of liquid discharged fromthepump'at each stroke of the plunger; in themeansprovided for agitatingthe liquidand-themeans for detachably securing the agitators to the pumprod; in the construction of the linkprovided for 'detachably connectingthe upper-endfof the pump rod to the operating lever; and, in thegeneral constructi'oniof the pump as a whole, including the one-piececonduit which leads. from the outlet passage of-the pump through theclosure :and has its'-op posite .end bent downwardly to provide adischarge sp'out'for the pump.

Other objects of 'the invention will appear from the followingdescription and iaccompanying drawings and will :be pointed out in theannexed claims.

In the accompanying drawings, there .has been disclosed a structurez'designedltocarry -out.the variousobjects of the invention, but

it is to be understood that the invention is not confined to the exactfeatures shown as various changes may be made within the scope of theclaims which follow.

I'n'the drawings:

Figure 1 is a'vertical sectional view showing my improved liquiddispenser;

Figure'2 is a detail sectional viewon the line 22 of1Figure 1; Figure '3is a-planv view ofthe receptacle closure;

Figure 4 is an enlarged detail sectional View on the line 44iof Figure1;

Figure 5 is-a' detail'sectional view onthe line 55'of Figure 3;

'Figurez6 is a detail sectional view onthe line.66"of Figure 1, showingthe agitators;

Figure 7 is a detail sectional .view showing a mannerrof detachablysecuring the agitators toithepump rod; and

F igure8 is a sectional view on the line 8-8 offFigurc'l, showing thebottom of the pump.

In the selected embodiment ofthe invention'here shown, there isillustrated in Figure 1, for purposes ofdisclosure, a. receptaclecomprising .an inner "lining '2. and an outer shell 3 spaced apart by asuitable material 4, as shown. The'b'ottom'wall 5 of the receptacleispreferably curved slightly downwardly as'shown so that the liquid willdrain to the center of'the receptacle, from .whence it may be drawn bymeans of the pump, which will subsequently be described. Thereceptacleis shown supported upon a suitable base 6.

The upper portion 7 of the wall of thelining 2 ofthe receptacle extendsinwardly to provide a reduced opening 8 adapted-to re ,ceive a closure9, formed of a suitable material' such for example, as-cast metal. Theshell'3 isprovided at its upper endwith a cone-shaped closing member 10having. its upper inner edge suitably interlocked with andksecuredtotheupper: edge of the wall portion? .of the lining 2, as shown in'Figures 1and-5; I

The :closure .9- is provided :with a cylindrical portion 11 overhung byan. annular flange lQIadapted to be seatedupon-the upper portion ofv thereceptacle wall portion 7. Spaced lugs 13 are provided on one side ofthe closure 9 and have their terminals projecting beyond the cylindricalportion 11 and spaced from the flange 12 so that they may be insertedbeneath the upper inturned portion 14 of the receptacle wall, as bestshown in Figure 5. These lugs prevent the cover from tilting in onedirection, when the pump is operated.

A feature of the invention resides in the general construction of thepump which, it will be noted, is suspended from the closure 9 and has noother connection with the walls oft-he receptacle, whereby it may bereadily removed from the receptacle for cleaning, when necessary. Thepump comprises a casing 15 defining a cylindrical chamber 16 adapted toreceive a plunger 17, preferably of a suitable metal, shaped as shown inFigure 1. The plunger 17 is secured to the lower end of a stem 18 havinga reduced portion 19, upon which a disk valve 20 is slidably mounted. Aseries of apertures 21 are provided in the plunger 17 adjacent to thestem 18, and these apertures are adapted to be closed by the disk 20,when the latter is in the position shown in Figure 1. A suitable spring22 is located within the bore 16 of the casing and has one end bearin gdownwardly against the plunger 17, and its opposite end seated in asuitable retaining groove provided in the upper wall of the casing. Thisspring constantly urges the plunger downwardly to the position shown inFigure 1.

The stem 18 has a threaded portion 23 provided with suitable adjustingnuts 24. The position of these nuts upon the threaded portion 23 of thestem 18 regulates the quantity 0 liquid dispensed per stroke of theplunger 1 ing 15 and communicates with the outlet passage 25. Theconduit extends upwardly from the'casing through the closure 9, thenceoutwardlyand has its opposite end bent downwardly to provide a dischargespout for the pump. The conduit 28 is provided at its discharge end witha suitable screen 29 which prevents the liquid from splashing, and alsotends to retain a portion of the liquid in the spout, when the pump isat rest. The conduit is formed from one continuous piece and is curvedin such a manner as to eliminate as far as possible, all corners andcrevices, whereby the outlet passage from'the pump may be readilycleansed by simply unscrewing the cap 30, securing the screen 29 to thedischarge end of the conduit, and inserting a small flexible brush orother suitable cleaning instrument through the conduit.

The means for operating the plunger 17 consists of an operating lever31, here shown pivotally mounted on a lug 32, preferably integrallyformed with the closure 9. A rod 33 has its lower end detachablyconnected with the stem 18 by means of a coupling 34 received inthreaded engagement with the upper end portion 35 of the stem 18 andengaged with a shoulder terminally provided on the rod 33. The-upper endof the rod is connected to the lever 31 by means of a link 34 providedwith laterally disposed pins 35, one of which is adapted to be receivedin an aperture provided on the upper end of the rod 33 and the other inan aperture provided in the end portion 36 of the lever 31. The link 34has a centrally located boss 37 provided with a threaded socket adaptedto receive a screw 38, upon wl ich is mounted a suitable coil spring 39having one end seated against the head of the screw 38 and its oppositeend against a retaining plate 40, adaptedtobe engaged with the roundedterminals of the pins 35 as shown in Figure 4. The retaining plate isformed with seats 40a adapted to receive the ends of the pins 35 toprevent disengagement of the coupling link 34 from the rod '33 and lever31. To disconnect the lever 31 from the rod 33, the retaining plate 40is relatively rotated upon the screw 38 to the dotted line positionshown in Figure 1, whereupon the link may be removed to disconnect thelever 31 from the rod 33. The lever 31 has a projection 31a adapted toengage the lug 32 to provide a stop for the lever 31. The spring 22normally holds the lever in the position'shown in Figure 1, with theprojection 31a engaged with the lug 32.

Another feature of the invention resides in the means provided foragitating the liquid in the receptacle each time the pump is operated.To thus agitate the liquid, suitable paddles or agitators 41 are securedto the rod 33 for operation therewith. Each paddle 41 is provided withan upright portion 42 terminating atits upper end in an oifset portion43, having an inwardly turned edge 44 adapted to be received in anannular groove 45 provided in the rod 33. vThe offset portion 43 of eachpaddle is shaped to conform to the curvature of the periphery of the rodDiametrically spaced sockets 46 are provided in the periphery of the rod33 adapted to receive small protuberances 47 formed in the offsetportion 43 of each paddle 41. The portions 43 are secured to the rod 33by a suitable retaining ring 48, as shown in Figure 7, which securelyclamps the portions 43 against the rod, and thus cooperateswith theannular groove 45 and sockets 46 to prevent relative movement of thepaddles upon the rod 33, during operation of the pump. The paddles maybe quickly detached from the rod by sliding the retaining ring upwardlyon the rod.

The novel liquid dispenser featured in this invention has been foundparticularly useful in restaurants, cafs, and similar places fordispensing measured quantities of cream. The pump is so constructed thatit may readily be disassembled for cleaning by simply unscrewing thecoupling 34 from the threaded terminal of the rod 33, after which theplunger may be withdrawn from the open end of the pump casing 15, whenthe closure 9, carrying with it the pump and its associated parts, isremoved from the receptacle] The pump is rigidly suspended from theclosure by means of the conduit 28 and a brace member 49 shown inFigure 1. As shown in the drawings, the conduit 28 is preferably castinto the metal from which the closure is constructed so as to form inefl'ect, an integral part thereof. By thus securing the conduit 28 inthe closure, the conduit may be made from one piece and shaped as shown,thereby eliminating joints and corners. When the plunger has beenremoved from the pump casing, the interior of the casing may readily bethoroly cleaned because of the absence of sharp corners and crevices.

The plunger is also designed with this point in view so that it, too,may be readily cleaned. Because of the one-piece construction of thedischarge conduit 28, it may be quickly and conveniently cleaned byinserting a flexible brush therethrough. The screen 29 must, of course,be detached from the conduit when cleaning the latter with a brush.

In devices of this character, it is essential that the parts he soconstructed that they may be conveniently cleansed and sterilized with aminimum of effort. The pump here shown adequately meets thoserequirements, in that the parts have been reduced to a minimum and allsharp corners and angles within the pump substantially eliminated.

I claim as my invention: 7

1. A device for dispensing liquids, comprising a pump including a casinghaving an open bottom to provide an intake passage, and having an outletpassage in its upper portion, a conduit having one end connected withsaid outlet passage and extending upwardly therefrom and curvedoutwardly and downwardly to provide a seamless discharge passage for thepump, a valved plunger operatively mounted in said casing, a leverforoperating said plunger, and means for regulating the quantity of liquiddispensed per stroke of the plunger.

2. A device for dispensing liquids, comprising a pump including a casinghaving an intake passage and an outlet passage, a spring-actuatedplunger in said casing provided with a check valve, said plunger havinga stem provided with a threaded terminal, a rod detachably connectedwith said stem and having liquid-agitating paddles detachably mountedthereon, an operating lever for the plunger, and a link for detachablyconnectingsaid lever with said rod, said link comprising pins engageablewith said lever and rod, and a spring-actuated retaining plate forsecuring the link in position upon the lever and rod.

3. In a device for dispensing liquid in measured quantities, acontainer, a closure therefor, a pump mounted in the container andcomprising a casing having an open bottom, the upper wall of said casinghaving a bore therein, a plunger rod mounted in said bore and having avalved plunger secured thereto and fitting within said casing, meansreceived in threaded engagement with said plunger rod within the casingby which the stroke of the plunger may be varied, said casing having adischarge opening in its upper wall provided with a ball check valve, adischarge conduit having one end secured to said pump casing and havingits intermediate portion secured to and supported in said closure, andmeans pivotally mounted upon said closure and detachably connected withsaid plunger rod and whereby the plunger may be actuated to cause aportion of the liquid in said container to be discharged therefromthrough said conduit.

4. In a device for dispensing liquid in measuredquantities, acontain-er, a closure therefor, a pump mounted in the container andcomprising a casing having an open bottom, the upper wall of said casinghaving a bore therein, a plunger rod mounted in said bore and having avalved plunger secured thereto and tting within said casing, threadedmeans by which the stroke of the plunger may be varied, said casinghaving a discharge opening in its upper wall provided with a ball checkvalve, a discharge conduit having one end secured to said pump casingand having its intermediate portion secured to and supported in saidclosure, and means pivotally mounted upon said closure and detachablyconnected with said plunger rod and whereby the plunger may be actuatedto cause a portion of the liquid in said container to be dischargedtherefrom through said conduit.

In witness whereof, I have hereunto set my hand this 21st day ofSeptember, 1929.

LYNN THOMPSON.

